This high-efficiency, energy-saving HDPE outer casing extrusion production line is specifically designed for manufacturing high-density polyethylene protective shells for polyurethane foam insulated pre-fabricated pipes according to international standards.
The line utilizes a vacuum sizing process, resulting in pipes with smooth inner and outer walls, excellent corrosion resistance, superior insulation properties, and outstanding mechanical performance, ensuring a long service life.

Production line composition:
-1set   Vacuum loader 
-1set   Hopper dryer
-1set   High-efficiency single screw extruder
-1set   Vacuum calibration table 
-1set   Water spraying tank 
-1set   Hauling machine
-1set   Cutting machine
-1set   Discharging Frame

Main line Composition of the polyurethane coating steel preinsulated pipe equipment:

Features of the HDPE outer protective pipe production line:
- Compact structure, small footprint
- High degree of automation, can be operated by a single person, saving labor costs
- Long design life and reliable operation
- High-efficiency extruder, high output and stable performance
- Uniform pipe wall thickness, smooth inner and outer surfaces
- High raw material utilization rate, no waste
- One-step molding, no trimming required


PU Foaming spray Pre Insulated Pipe Continuous Production Line
 

Producing technology flow of the polyurethane coating steel preinsulated pipe equipment:

1. Remove rust from steel pipe surface

2. preheat the steel pipe to get it ready for polyurethane spraying

3. Spray polyurethane evenly on steel pipe outer surface

4. Wrap melted HDPE strap around the PU foam

5. Trim the pipe ends

Steel pipe rust removal equipment

Polyurethane foam for jacket pipes

-Supply full completed production solution: design, installation, commissioning,training 
-Share you 389 sets of production experience from all the world
-Having 9 professional senior engineers
-Having a high-end plastic machinery equipment expert workstation in China

Qingdao Huashida Machinery Co., LTD, is a manufacturer of series of plastic pipe machines, municipal pipe machines, pipe insulation&anticorrosion machines, and pipe jointing&anticorrosion materials, with 23 years of production experience. 

Huashida machines have been well received in Saudi Arabia, Kazakhstan, Uzbekistan, United Arab Emirates, Turkey, Russia, etc.
Shandong Province's first set of insulation pipe production line (awarded honor)



Our main products are:
1. HDPE jacket pipe for pre-insulated pipe Production Line (110-2200mm)
2. Rigid pre-insulated pipe Production Line
3. Flexible pre-insulated pipe(PERT) production line
4. Steel pipe FBE/2LPE/3LPE anti-corrosion coating line
5. Steel pipe derusting line
6. PE pressure pipe/Water Gas supply pipe production line
6. PP/PE plastic board/sheet/geomembrane production line
7. NBR PVC Thermal insulation tube/plate production line  
8.Pipeline anti-corrosion materials and instruments: heat shrink joint coating sleeve, electro-fusion weldable joint sleeve, portable welding gun(extruder), PE PP welding rod. 

Exhibition

Abu Dhabi Oil and Gas Exhibition 2025

Thank you very much for you looking into Huashida equipment. For more details, please come back to us. We will respond immediatedly  and work out a customized plan for you according to your requirements and demands.